QOL: Adds bash tab completion cycling

[coolbotic]

Summary

Updates the bash config (inputrc) to enable menu-style tab completion for completion candidates. Preserves the existing “common prefix” completion behaviour while allowing candidates to be cycled using repeated Tab presses.

1st Tab: Functionally remains the same, showing a list of completions and filling in common when ambiguous.
2nd+ Tab: Cycles through each candidate (with Shift-Tab cycling backwards)

This behaviour mimics what I got used to liking when using ZSH previously.

Drawbacks

You do lose the nice annotations on some completions by replacing complete with menu-complete. Maybe binding to a different key combo could get around this.

e.g:
Before:

> docker # 1st Tab
attach      (Attach local standard input, output, and error streams to a running container) 
images      (List images)                                                                  
rmi         (Remove one or more images)
...

After:

> docker # 1st Tab
attach      builder     commit 
...